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 * @Author: yaojian66 1327629137@qq.com
 * @Date: 2022-06-29 14:07:18
 * @LastEditors: yaojian66 1327629137@qq.com
 * @LastEditTime: 2022-06-29 14:38:48
 * @FilePath: \geyao\第九十四题 扁平化数组.html
 * @Description: 这是默认设置,请设置`customMade`, 打开koroFileHeader查看配置 进行设置: https://github.com/OBKoro1/koro1FileHeader/wiki/%E9%85%8D%E7%BD%AE
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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>扁平化数组</title>
</head>
<body>
  <script>
    const _flatten = arr => {
        // 补全代码
        return arr.reduce((pre, cur) => {
        return pre.concat(Array.isArray(cur) ? _flatten(cur) : cur)
    }, [])
    }
</script>
</body>
</html>